- Wall/Rackmount.- Designed for use with Total Access 612, 616, 624, 750, 850, 912, 916, or 924.- Requires use of AC power supply battery charger (1175043L2) when used with the Total Access 750 or 850.- Mounting brackets available (1200626L1) for mounting a Total Access 612, 616, or 624 to this Battery Backup System (1175044L1).